* Barebones SASL authentication service for XMPP (Jabber) clients.
*
* Note: RFC3920 says we "must" support DIGEST-MD5 but we only support PLAIN.
* Barebones SASL authentication service for XMPP (Jabber) clients.
*
* Note: RFC3920 says we "must" support DIGEST-MD5 but we only support PLAIN.